Extraction of HReO4, HNO3, HBr and HCl by trioctylphosphine oxide in nitrobenzene and in 1,2-dichloroethane, and hydration of the anions

Bucher, J. J.; Conocchioli, T. J.; Held, E.R.; Labinger, Jay A.; Sudbury, Barry A.; Diamond, R.M.

doi:10.1016/0022-1902(75)80154-0

Cited by 10 publications

(2 citation statements)

References 20 publications

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“…51 See also the extraction studies on HReO 4 , HClO 4 and HAuCl 4 by the phosphine oxide (TOPO) analogue of TBP. 52 In such studies (see also ref. [52][53][54][55], generally based on slope analysis of extraction curves, the state of the acids was not clarified.…”

Section: Acid Extractionmentioning

confidence: 99%

“…52 In such studies (see also ref. [52][53][54][55], generally based on slope analysis of extraction curves, the state of the acids was not clarified. In early reports with different acids, it was stated that the key mechanism for HA acids extraction from aqueous to TBP phase was the formation of ''complexes'' of HA(TBP) n formula (n = 1 to 3, HA = HNO 3 , HCl, HClO 4 , CH 3 CO 2 H, H 3 PO 4 ).…”

Section: Acid Extractionmentioning

confidence: 99%

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Acid extraction to a hydrophobic ionic liquid: the role of added tributylphosphate investigated by experiments and simulations

Gaillard

Mazan

Georg

et al. 2012

Phys. Chem. Chem. Phys.

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We have studied the extraction of four HA acids (HNO(3), HReO(4), HClO(4), HCl) to a hydrophobic ionic liquid (IL) 1-butyl-3-methylimidazolium-bis(trifluoromethanesulfonyl)amide (BMI(+) Tf(2)N(-)) at room temperature, in a wide range of acidic concentrations in water. The effect of tributylphosphate (TBP) as co-solvent is investigated. According to experimental observations, water dragging to the IL phase increases with added TBP and/or acids. Acid extraction is found to be weak, however, for the four acids except for concentrated HNO(3) (>3 M). Molecular dynamics simulations on model biphasic systems show that TBP is not surface active, but well dissolved in the IL. They also reveal the importance of HA acid model (either totally or half dissociated) and of the TBP content on acid extraction to the IL. Furthermore, they show that "the proton" can be extracted by TBP (H(3)O(+)(TBP)(3)"complex") without its A(-) conjugated base, via a cation transfer mechanism (BMI(+) transfer to water). Experiments and simulations show that TBP plays an important role in the mutual solubility between water and ionic liquid, by different amounts, depending on the HA acid. On the other hand, both approaches indicate that a HTf(2)N containing aqueous solution completely mixes with the [BMI][Tf(2)N] IL that contains the same Tf(2)N(-) anion.

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Section: Acid Extractionmentioning

confidence: 99%

Section: Acid Extractionmentioning

confidence: 99%

Acid extraction to a hydrophobic ionic liquid: the role of added tributylphosphate investigated by experiments and simulations

Gaillard

Mazan

Georg

et al. 2012

Phys. Chem. Chem. Phys.

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Extraction of hydrobromic acid and uranyl bromide by trioctylphosphine oxide in cyclohexane and chloroform

Mojski

Poitrenaud

1976

J. Radioanal. Chem.

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Thermodynamics of extraction of Re O−4 from aqueous sulfuric acid media with Tri-n-butyl phosphate dissolved in kerosene

Sadrnezhaad

Alamdari

2001

Metall Mater Trans B

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Rhenium distribution between Tri-n-butyl phosphate (TBP) dissolved in kerosene and sulfuric aqueous media is investigated under different temperatures, acidities, and TBP concentrations. Results show an exothermic extraction reaction with a distribution factor that decreases with the increase of the temperature and increases with the increase of the acidity and the TBP concentration. The stoichiometry of the reaction indicates neutralization of 1 mole of H + with 1 mole of ReO Ϫ 4 and solvating of a neutral molecule with four molecules of TBP. The structure of the complexes formed is, therefore, 4TBP и HReO 4 . The apparent Gibbs free energy of the formation of 4TBP и HReO 4 from TBP, ReO Ϫ 4 , and H + is determined to be equal to Ϫ66,989 ϩ 219.8 T J/mole.

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Extraction of HReO4, HNO3, HBr and HCl by trioctylphosphine oxide in nitrobenzene and in 1,2-dichloroethane, and hydration of the anions

Cited by 10 publications

References 20 publications

Acid extraction to a hydrophobic ionic liquid: the role of added tributylphosphate investigated by experiments and simulations

Acid extraction to a hydrophobic ionic liquid: the role of added tributylphosphate investigated by experiments and simulations

Extraction of hydrobromic acid and uranyl bromide by trioctylphosphine oxide in cyclohexane and chloroform

Thermodynamics of extraction of Re O−4 from aqueous sulfuric acid media with Tri-n-butyl phosphate dissolved in kerosene

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